Thank you very much for your useful information.
I bought the boat this May and it came with that sail K628. As you say it looks it is from a newer boat. The only plaque I have is the Parker with number 950.
Thank you again.
Thank you very much for your informations.
Sail number is K 628, (being K substituted in new boats for GB)
The boat was abandoned for 6 years. I've been restoring it for better days.